Ovulation side and occurrence of mittelschmerz in spontaneous and induced ovarian cycles.
D000328:Adult; D005260:Female; D006801:Humans; D008598:Menstruation; D006080:Ovarian Follicle / Q000502:physiology; D010060:Ovulation; D010146:Pain / Q000209:etiology*; D014465:Ultrasonics